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12f grader

12f grader

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Cowilson
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I have a 12f grader I recently purchased. I’m looking for engine parts for it. I have a machine sn but no engine sn which seems to be what everyone needs to find parts. Any help On locating the engine sn or how to find parts?

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Mon, Jan 5, 2026 10:26 PM
Old Magnet
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There are many models of 12F graders, what is the s/n of what you have. Most used the D333 engines where s/n of the engine and the vehicle are the same.

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Tue, Jan 6, 2026 12:07 AM
Cowilson
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Reply to Old Magnet:

There are many models of 12F graders, what is the s/n of what you have. Most used the D333 engines where s/n of the engine and the vehicle are the same.

Sn I have is 89Hxxx. All the parts houses say it not a good engine number.

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Tue, Jan 6, 2026 2:14 AM
Old Magnet
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What's the rest of the s/n? the 89H is somewhat of a limited production unit but used the very common D333C (4-3/4" bore) up until 89H1538 when the engine designation changed to the (03N) 3306 engine.

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Tue, Jan 6, 2026 3:10 AM
Cowilson
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89h924. That info helps a lot. What I was running into was the different bore sizes. Thanks.

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Tue, Jan 6, 2026 4:29 AM
Cowilson
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Any good sources for overhaul kits?

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Tue, Jan 6, 2026 6:29 PM
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